package homework;

/**
 * @ClassName Circular
 * @Description TODO
 * @Author 黑白灰色雨
 * @Date 2024/8/26 15:29
 * @Version 1.0
 */
public class Circular {
    final double pai=3.14;


    public void area(double r){
        System.out.println("这个圆的面积是："+(pai*r*r));
        System.out.println("你好，世界！");
    }
}
